Fixed a few warnings.

Rev: src/builtin_functions.c:1.299
Rev: src/modules/HTTPLoop/cache.c:1.14
Rev: src/modules/HTTPLoop/cache.h:1.7
Rev: src/modules/HTTPLoop/requestobject.c:1.14
Rev: src/modules/Image/encodings/bmp.c:1.28
Rev: src/peep.c:1.36
Rev: src/program.c:1.264